When and which dynasty was Dujiangyan built?

Dujiangyan is a world-famous water conservancy project with a history of more than 2,000 years. Dujiangyan has been playing the role of flood control and irrigation for more than 2,000 years. Dujiangyan has been nourishing Sichuan, a land of abundance, making it able to control floods and droughts and fertile soil thousands of miles away. So when and which dynasty was such a great Dujiangyan engineer built? Looking through the history books, in 256 BC, Dujiangyan was planned and built by Li Bing, the satrap of Qin State, and his son * * *.

I. Location of Dujiangyan Dujiangyan Water Conservancy Project is located in the west of Dujiangyan City, Sichuan Province, China, with very pleasant scenery and is praised by the world? The originator of world water culture? . Dujiangyan is located on the Minjiang River, surrounded by tourist attractions such as Zhao Gong, Nanqiao and An Lan Bridge. Dujiangyan water conservancy project is located in the subtropical monsoon climate zone, so the annual average temperature here is 15.2℃, and the four seasons are very distinct. It is neither cold nor hot here, so it is a pleasant place to live.

Second, the history of construction was in the Sichuan Plain, which was a region with severe floods and droughts. Li Bai's Difficult Road to Shu describes in great detail the real misery of people's lives at that time, and these tragedies are all due to the natural climate of Chengdu Plain and Minjiang River? Not good? Caused. During the Spring and Autumn Period and the Warring States Period, Li Bing and his son, the county magistrate of Qin State, first started to build Dujiangyan Dam. The dam was built around 256 BC, which is the greatest engineering project in the history of China, and consists of many aspects of design and formulation.

The completion of Dujiangyan Water Conservancy Project has not only alleviated the flood and drought disasters of people in Chengdu Plain, but also achieved the oldest project in the world. Moreover, Dujiangyan is the only dam that is still in trial operation so far. This dam embodies the diligence and wisdom of the ancient people in China, and also shows the diligence and courage of the ancient working people in China.